About HAEHAE is a rare acute inflammatory condition characterized by episodes of severe, often painful swelling affecting the extremities, gastrointestinal tract, genitalia, and larynx. HAE is caused by low or dysfunctional levels of C1 esterase inhibitor (C1-INH), a naturally occurring molecule that inhibits plasma kallikrein, a key mediator of inflammation, and other serine proteases in the blood. HAE is estimated to affect up to 1 in 50,000 individuals. Learn more at www.HAEHope.com. About Dyax Dyax is a fully integrated biopharmaceutical company focused on the discovery, development and commercialization of novel biotherapeutics for unmet medical needs. The Company's key value drivers are the KALBITOR ® (ecallantide) business, DX-2930 and the Licensing and Funded Research Program (LFRP). Dyax developed KALBITOR on its own and, since February 2010, has been selling it in the United States for the treatment of acute attacks of HAE in patients 16 years of age and older. Outside the United States, the Company has established partnerships to obtain regulatory approval and commercialize KALBITOR in certain markets and is evaluating opportunities in others. The Company is developing products to expand its angioedema portfolio, including a therapeutic candidate, DX-2930, for the prophylactic treatment of HAE and a diagnostic test to identify plasma kallikrein-mediated disorders. KALBITOR and DX-2930 were identified using Dyax's patented phage display technology, which rapidly selects compounds that bind with high affinity and specificity to therapeutic targets. Dyax leverages this technology broadly through the LFRP. This program has provided the Company a portfolio of product candidates being developed by its licensees, which currently includes 13 revenue generating product candidates in various stages of clinical development, including three in Phase 3 trials. For additional information about Dyax, please visit www.dyax.com. For additional information about KALBITOR, including full prescribing information, please visit www.KALBITOR.com. Disclaimer This press release contains forward-looking statements, including statements regarding the prospects for the Phase 1 clinical trial for DX-2930. Statements that are not historical facts are based on Dyax’s current expectations, beliefs, assumptions, estimates, forecasts and projections about the industry and markets in which Dyax and its licensees compete. The statements contained in this release are not guarantees of future performance and involve certain risks, uncertainties and assumptions, which are difficult to predict. Therefore, actual outcomes and results may differ materially from what is expressed in such forward-looking statements because of uncertainties involved in any future projections, as well as uncertainties associated with various activities and aspects of Dyax’s business, including risks and uncertainties associated with the following: competition from new and existing treatments for HAE; changing requirements and costs associated with Dyax's planned research and development activities; the uncertainty of patent and intellectual property protection; Dyax’s dependence on key management and key suppliers; and other risk factors described or referred to Item 1A, “Risk Factors” in Dyax’s most recent Annual Report on Form 10-K and other periodic reports filed with the Securities and Exchange Commission. Dyax cautions investors not to place undue reliance on the forward-looking statements contained in this release. These statements speak only as of the date of this release, and Dyax undertakes no obligations to update or revise these statements, except as may be required by law.